Bontrager
Race XXX Carbon Stem (+/-7-degree Rise)

Details

Bontrager's Race XXX Carbon Road Stem is strong enough to handle the torque from 1,800-watt road sprints and the punishment of XC races. With a 4-bolt faceplate and angled steer clamp, the XXX stem distributes clamping loads evenly so its safe on ultra-lightweight carbon bars and steerers. This stem's feathery weight ensures your bike is that much lighter when the road tilts skyward and its carbon construction cuts down on vibration so you never get numb hands.

Stem angle is one of the factors that determines handlebar height. A listed angle of 0 degrees actually provides a rise of 16-20 degrees, depending on the bike's head-tube angle. Flexible, athletic riders prefer lower-rise stems, while recreational riders usually favor higher-rise stems.

Stem length is measured along the side of the stem from the center of the steerer to the center of the handlebar clamp (see diagram). Keep in mind that as a stem provides more rise, its effective length decreases. In the example above, if the +17-degree stem measures 135 mm, it actually extends 108 mm parallel to the ground.